A C-language Code to generate Cherenkov light
from the Sembroski/Kurtzman kascade program.

Developed initially in 1992 by David Carter-Lewis,
the cherenkf program has progressed through six versions to its present
state. The code generates the Cherenkov photons from the kascade
particle tracks and follows these photons to the ground plane. It
calculates the atmospheric density, index of refraction, then generates
an appropriate number of photons and tracks them to the ground. The
shower core may be randomly distributed in a circular area
in the plane of the telescope.